feat(ee): MCP OAuth (#2432)

* feat: mcp oauth

* fix: small refactor

* fix: cleanup consent

apps/server/src/common/helpers/security-headers.spec.ts

@@ -0,0 +1,66 @@
+import {
+  resolveFrameHeader,
+  resolveFrameHeadersForPath,
+  SecurityHeader,
+} from './security-headers';
+
+describe('resolveFrameHeader', () => {
+  it('denies framing with X-Frame-Options when embedding is off', () => {
+    expect(resolveFrameHeader(false, [])).toEqual({
+      name: 'X-Frame-Options',
+      value: 'SAMEORIGIN',
+    });
+  });
+
+  it('returns null when embedding is on but no origins are configured', () => {
+    expect(resolveFrameHeader(true, [])).toBeNull();
+  });
+
+  it('emits a frame-ancestors CSP for the allowed origins', () => {
+    expect(resolveFrameHeader(true, ['https://a.example', 'https://b.example']))
+      .toEqual({
+        name: 'Content-Security-Policy',
+        value: "frame-ancestors 'self' https://a.example https://b.example",
+      });
+  });
+});
+
+describe('resolveFrameHeadersForPath', () => {
+  const configured: SecurityHeader = {
+    name: 'Content-Security-Policy',
+    value: "frame-ancestors 'self' https://a.example",
+  };
+
+  it.each(['/oauth/consent', '/oauth/consent/nested'])(
+    'force-denies %s regardless of configured header',
+    (path) => {
+      expect(resolveFrameHeadersForPath(path, configured)).toEqual([
+        { name: 'X-Frame-Options', value: 'DENY' },
+        { name: 'Content-Security-Policy', value: "frame-ancestors 'none'" },
+      ]);
+    },
+  );
+
+  it('force-denies consent even when the global header is absent', () => {
+    expect(resolveFrameHeadersForPath('/oauth/consent', null)).toEqual([
+      { name: 'X-Frame-Options', value: 'DENY' },
+      { name: 'Content-Security-Policy', value: "frame-ancestors 'none'" },
+    ]);
+  });
+
+  it('does not match an unrelated path that merely contains the prefix', () => {
+    expect(
+      resolveFrameHeadersForPath('/oauth/consenting-adults', configured),
+    ).toEqual([configured]);
+  });
+
+  it('passes the configured header through for other paths', () => {
+    expect(resolveFrameHeadersForPath('/home', configured)).toEqual([
+      configured,
+    ]);
+  });
+
+  it('returns nothing for other paths when no header is configured', () => {
+    expect(resolveFrameHeadersForPath('/home', null)).toEqual([]);
+  });
+});